Determine how many atoms of silver would be produced if 100 grams of copper reacts with an excess of silver nitrate? given the equation: cu + 2 agno3 -> cu(no3)2 + 2 ag avogadro's number: 6.02 x 1023

-

2 x 10 ²⁴ atoms of Ag rounded off to 1 significant figures.

Explanation: -

Mass of Cu = 100 g

Molar mass of Cu = 63.55 g / mol

Number of moles of Cu = 100 g / (63.55 g/mol)

= 1.574 mol of Cu

The balanced chemical equation for the reaction is

Cu + 2AgNO₃ → Cu(NO₃)₂ + 2 Ag

From the balanced chemical equation we see

1 mol of Cu gives 2 moles of Ag

1.574 mol of Cu gives

= 3.148 mol of Ag

1 mole of Ag has 6.02 x 10 ²³ atoms of Ag according to Avogadro's Law.

3.148 mol of Ag has

= 18.95 x 10²³ atoms of Ag

= 2 x 10 ²⁴ atoms of Ag rounded off to 1 significant figures.

when 25.0 ml of 0.700 mol/l naoh was mixed in a calorimeter with 25.0 ml of 0.700 mol/l hcl, both initially at 20.0 °c, the temperature increased to 22.1 °c. the heat capacity of the calorimeter is 279 j/°c.

the equation for the reaction is:

naoh + hcl → nacl + h₂o

moles of hcl = 0.0250 l hcl ×

0.700

mol hcl

1 l hcl = 0.0175 mol hcl

volume of solution = (25.0 + 25.0) ml = 50.0 ml

mass of solution = 50.0 ml soln ×

1.00

ml soln

= 50.0 g soln

δt=t2-t1

= (22.1 – 20.0) °c = 2.1 °c

the heats involved are

heat from neutralization + heat to warm solution + heat to warm calorimeter = 0

q1+q2+q3=0

nδh+mcδt+cδt=0

0.0175 mol ×

δh

+ 50.0 g × 4.184 j·g⁻¹°c⁻¹ × 2.1 °c + 279 j°c⁻¹ × 2.1 °c = 0

0.0175 mol ×

δh

+ 439.32 j + 585.9 j = 0

0.0175 mol ×

δh

= -1025.22 j

δh=1025.22j0.0175 mol= -58 600 j/mol = -58.6 kj/mol

honesty and integrity.

inspire others.

commitment and passion.

good communicator.

decision-making capabilities.

accountability.

delegation and empowerment.

creativity and innovation.

here are the traits of a good leader.i'm not going to give you the examples so you can copy right it.that's illegal but i hope that this you out.